247305743 has 6 divisors (see below), whose sum is σ = 254171736. Its totient is φ = 240620472.

The previous prime is 247305733. The next prime is 247305763. The reversal of 247305743 is 347503742.

It is not a de Polignac number, because 247305743 - 2⁶ = 247305679 is a prime.

It is a super-2 number, since 2×247305743² = 122320261041564098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247305733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88955 + ... + 91692.

It is an arithmetic number, because the mean of its divisors is an integer number (42361956).

Almost surely, 2^247305743 is an apocalyptic number.

247305743 is a deficient number, since it is larger than the sum of its proper divisors (6865993).

247305743 is an equidigital number, since it uses as much as digits as its factorization.

247305743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180721 (or 180684 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 247305743 is about 15725.9576179004. The cubic root of 247305743 is about 627.6893122552.

The spelling of 247305743 in words is "two hundred forty-seven million, three hundred five thousand, seven hundred forty-three".